248 was last used in 1955. 270 and 302 were both available in 1955.
Common lower end parts for 1955 included:
main bearing sets
main bearing caps
rods and rod bearings
248 pistons were available from GMC as large as ".075 oversize rough"
Starting in 1956 GMC Parts Master Book calls out different (from 1955)
part numbers for 270 and 302
pistons, rings and pins
main bearing sets
main bearing caps (only one that changes is the thrust bearing cap)
270 and 302 engines used the same crankshaft (4" stroke).
-----Original Message-----
From: old-chevy-truck@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Steve Hanberg
Sent: Tuesday, February 13, 2007 11:24 AM
To: old-chevy-truck@yahoogroups.com
Subject: Re: [old-chevy-truck] Re: Canadian GMC 55 engine ID
The serial number does mean its a 248. I don't know if a 248 can
be bored and stroked to 302 or not.
[EMAIL PROTECTED] <mailto:Steve%40OldSub.com>
www.OldSub.com
----- Original Message -----
From: vwnate1
To: old-chevy-truck@yahoogroups.com
<mailto:old-chevy-truck%40yahoogroups.com>
Sent: Tuesday, February 13, 2007 8:28 AM
Subject: [old-chevy-truck] Re: Canadian GMC 55 engine ID
The tiny bit I know about GMC InLine 6 bangers tells me the
stamped in
digits will tell you the displacement so if the stamped in
serial
number begins with " 248 " it's a 248 C.I.D. engine no metter
what B.S.
the seller says , what will bring a higher E-pay price ? . you
figure
it out .
BTW : a 248 is still a great engine and has gobs more power and
spped
than any Chevy InLine 6 Banger....
-Nate
Mark wrote:
>
> got an ebayer claiming to have a 302 but the engine ID he gave
me
> starts with 248.. canadian motor. bettin its 248-anyone back
me up on
> this w/good info?
> thanks
> he says casting number says 270, and listing says 302(which im
> interested in)
> mark
> 160083362755
>
[Non-text portions of this message have been removed]
[Non-text portions of this message have been removed]
Ole Chevy and GMC trucks rule!
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